Slim 3 get current route in middleware

问题:

I want to get the name of the current I route in a middleware class. Previously (in Slim 2.*) you could fetch the current route like so:

$route = $this->app->router->getCurrentRoute();

But this function has been removed in the 3.0 version of Slim. I've found the following code in the __invoke method of Slim\App:

    // Get the route info
    $routeInfo = $request->getAttribute('routeInfo');

    /** @var \Slim\Interfaces\RouterInterface $router */
    $router = $this->container->get('router');

    // If router hasn't been dispatched or the URI changed then dispatch
    if (null === $routeInfo || ($routeInfo['request'] !== [$request->getMethod(), (string) $request->getUri()])) {
        $request = $this->dispatchRouterAndPrepareRoute($request, $router);
        $routeInfo = $request->getAttribute('routeInfo');
    }

This indicates that the current route is stored as the attribute routeInfo in the Request. But it seems that my custom middleware class is called before the attribute is set (by the $this->dispatchRouterAndPrepareRoute($request, $router); method). Because calling $request->getAttribute('routeInfo') resolves to NULL.

So my question is; how can I get the current route (or the name of the route) from a middleware function/class?

Or should I just copy the piece of code above from Slim\App?

回答1:

For Slim3, here is an example showing you how to get routing information from within middleware, which is actually a combination of previous answers put together.

<?php

$slimSettings = array('determineRouteBeforeAppMiddleware' => true);

// This is not necessary for this answer, but very useful
if (ENVIRONMENT == "dev")
{
    $slimSettings['displayErrorDetails'] = true;
}

$slimConfig = array('settings' => $slimSettings);
$app = new \Slim\App($slimConfig);


$myMiddleware = function ($request, $response, $next) {

    $route = $request->getAttribute('route');
    $routeName = $route->getName();
    $groups = $route->getGroups();
    $methods = $route->getMethods();
    $arguments = $route->getArguments();

    print "Route Info: " . print_r($route, true);
    print "Route Name: " . print_r($routeName, true);
    print "Route Groups: " . print_r($groups, true);
    print "Route Methods: " . print_r($methods, true);
    print "Route Arguments: " . print_r($arguments, true);
};

// Define app routes
$app->add($myMiddleware);


$app->get('/', function (\Slim\Http\Request $request, Slim\Http\Response $response, $args) {
    # put some code here....
})

In my case, I wanted to add middleware that would ensure the user was logged in on certain routes, and redirect them to the login page if they weren't. I found the easiest way to do this was to use ->setName() on the routes like so:

$app->get('/', function (\Slim\Http\Request $request, Slim\Http\Response $response, $args) {
    return $response->withRedirect('/home');
})->setName('index');

Then if this route was matched, the $routeName in the middleware example will be "index". I then defined my array list of routes that didn't require authentication and checked if the current route was in that list. E.g.

if (!in_array($routeName, $publicRoutesArray))
{
    # @TODO - check user logged in and redirect if not.
}

回答2:

Apparently you can configure Slim to determine the route before going into the middleware with this setting:

$app = new Slim\App([
    'settings'  => [
        'determineRouteBeforeAppMiddleware' => true,
    ]
]);

I'm not sure what kind of impact this has, but it works for me :)

回答3:

$request->getUri()->getPath()

Get current Route, even in middleware.

回答4:

Does the following provide you with sufficient information you require or do you also need the 'request' bit in routeInfo?

$app->getContainer()->get('router')->dispatch($req);

If you also require the 'request' bit then you will need to manually do the same thing dispatchRouterAndPrepareRoute does.

if ($routeInfo[0] === Dispatcher::FOUND) {
            $routeArguments = [];
            foreach ($routeInfo[2] as $k => $v) {
                $routeArguments[$k] = urldecode($v);
            }

            $route = $router->lookupRoute($routeInfo[1]);
            $route->prepare($request, $routeArguments);

            // add route to the request's attributes in case a middleware or handler needs access to the route
            $request = $request->withAttribute('route', $route);
        }

        $routeInfo['request'] = [$request->getMethod(), (string) $request->getUri()];

Hope this helps.

回答5:

Here's how you get current route in your middleware in Slim framework 3:

$routeInfo = $request->getAttribute('routeInfo');

Note that you should use this inside __invoke() function in your middleware. Here's the sample usage:

public function __invoke($request, $response, $next)
    {
        ....
        $routeInfo = $request->getAttribute('routeInfo');
        ....
    }

$routeInfo shall then contain an object like:

{
    "0": 1,
    "1": "route6",
    "2": {
      "name": "loremipsum"
    },
    "request": [
      "POST",
      "http://example.org/loremipsum"
    ]
  }